> One of the fundamental differences between macOS and Windows is the menu bar. There's only one at a time, and it belongs to the program which has the focus. A

> One of the fundamental differences between macOS and Windows is the menu bar. There's only one at a time, and it belongs to the program which has the focus. A corollary of this is that you don't need a window to have a program. The core difference is that macOS is (originally) document-oriented. You could care less if an app is opened or not, window == document, whereas on Windows, window == program. Each progressively grew into the direction of the other (e.g Finder progressively losing spatial features and Explorer gaining them, MDI interfaces on macOS vs the win7 taskbar being actually more of a Dock...)